From eebb425102bc3978c37c8c8595277d7eae2ea78c Mon Sep 17 00:00:00 2001
From: Caojunwei <97785943+dvdcjw@users.noreply.github.com>
Date: Fri, 19 Jul 2024 07:48:00 +0800
Subject: [PATCH] Update dxcam.py

---
 dxcam/dxcam.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dxcam/dxcam.py b/dxcam/dxcam.py
index b83f5f8..afc54e5 100644
--- a/dxcam/dxcam.py
+++ b/dxcam/dxcam.py
@@ -147,6 +147,9 @@ def stop(self):
         self.__stop_capture.clear()
 
     def get_latest_frame(self):
+        if not self.is_capturing:
+            raise capture_error(
+                'camera is not started. camera.get_latest_frame unavailable.\nDid you forgot to run camera.start?')
         self.__frame_available.wait()
         with self.__lock:
             ret = self.__frame_buffer[(self.__head - 1) % self.max_buffer_len]